From £9,744
Trusted and professional extension builder in CT21. Experienced in all extension buildering work and keeping within budget and on quote. Stade Stre...
From £9,840
Trusted and professional extension builder in CT21. Experienced in all extension buildering work and keeping within budget and on quote. Sprinks Co...
From £9,776
Tom Clark - Raison Home UK is a trusted extension builder serving customers in CT21 and the surrounding area. Contact us to today to get a competit...
From £9,936
Experienced extension builder ready to quote for your work. THE EAST CLIFF BUILDING CO LTD is the best extension builder in CT21. No obligation fre...
From £9,664
Pentland Homes is an established extension buildering business in CT21. We come highly recommended and provide competitive quotes for your work.
From £9,664
Experienced extension builder ready to quote for your work. Buildstead is the best extension builder in CT21. No obligation free quotes and many ha...
From £9,816
Relax... you have found a reliable extension builder in CT21. LEVEL CONSTRUCTION is a friendly and reliable company based in CT21 who consider no ...
From £9,736
Need an Extension Builder in CT21? M LONG T/A MJ BUILDINGS has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £9,656
John Nicoll trained as a joiner and carpenter in St Andrew's, Fife. For over 30 years, he has been operating in the London area - setting up 5 Ways...
From £10,184
Goddard’s Home Improvement’s Ltd is a family-run business with over 16 years’ experience in the building industry. We know it can be hard to ...

Outbuilding costs in CT21 range from the cheapest of £9,656 (5 Ways Carpentry based in CT15) to the dearest of £10,184 (Goddard’s Home Improvement’s Ltd based in TN28), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in CT21 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Hythe | £31 | £228 |
| Outbuilding near Folkestone | £31 | £233 |
| Outbuilding near Ashford | £36 | £256 |
| Outbuilding near Dover | £29 | £226 |
| Outbuilding near Canterbury | £31 | £232 |
| Outbuilding near Deal | £26 | £199 |
| Outbuilding near Faversham | £34 | £235 |
| Outbuilding near Whitstable | £28 | £214 |
| Outbuilding near Herne Bay | £28 | £213 |
| Outbuilding near Swale | £35 | £241 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,302

Two storey extension - £87,702

Build a timber frame extension - £25,802

Build a swimming pool - £80,802

Single storey extension - £51,032

Side return extension - £39,268

Install an RSJ - £2,002

Outbuilding - £9,802

Build a Mansard loft conversion - £51,802

Loft conversion - £31,890

Build a kitchen extension - £41,802

Hip to gable loft conversion - £41,802

Granny annexe - £86,802

Garden office - £9,802

Convert a Garage - £15,802

Garage - £18,302

Build a flat roof extension - £21,802

Build a dormer loft conversion - £41,802

Concrete foundations - £6,052

Convert a bungalow loft - £28,802

Convert a basement - £35,268